When longitude is not reordered (without CircularSort()), and longitude range is from big to small (e.g., values(list(20, 10))), lon1 and lon2 in the parameter 'crop' of the transform list need to be exchanged (i.e., lon1 = 10 and lon2 = 20).
When longitude is not reordered (without CircularSort()), and longitude range is from big to small (e.g., values(list(20, 10))), lon1 and lon2 in the parameter 'crop' of the transform list need to be exchanged (i.e., lon1 = 10 and lon2 = 20).